Key for handcuffs



FIG. 1 is a top, front end and left side perspective view of a key for handcuffs showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a bottom plan view thereof; and

FIG. 4 is a rear end elevational view thereof. 

The ornamental design for a key for handcuffs, as shown. 